US7654723B2 - Optical plate and backlight module using the same - Google Patents

Optical plate and backlight module using the same Download PDF

Info

Publication number
US7654723B2
US7654723B2 US11/845,100 US84510007A US7654723B2 US 7654723 B2 US7654723 B2 US 7654723B2 US 84510007 A US84510007 A US 84510007A US 7654723 B2 US7654723 B2 US 7654723B2
Authority
US
United States
Prior art keywords
optical plate
backlight module
light
plate
conical frustum
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US11/845,100
Other languages
English (en)
Other versions
US20080266874A1 (en
Inventor
Shao-Han Chang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hon Hai Precision Industry Co Ltd
Original Assignee
Hon Hai Precision Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hon Hai Precision Industry Co Ltd filed Critical Hon Hai Precision Industry Co Ltd
Assigned to HON HAI PRECISION INDUSTRY CO., LTD. reassignment HON HAI PRECISION INDUSTRY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHANG, SHAO-HAN
Publication of US20080266874A1 publication Critical patent/US20080266874A1/en
Application granted granted Critical
Publication of US7654723B2 publication Critical patent/US7654723B2/en
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0043—Inhomogeneous or irregular arrays, e.g. varying shape, size, height
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/001—Axicons, waxicons, reflaxicons
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer

Definitions

  • the present invention relates to an optical plate for use in, for example, a backlight module, the backlight module typically being employed in a liquid crystal display (LCD).
  • a backlight module typically being employed in a liquid crystal display (LCD).
  • LCD liquid crystal display
  • liquid crystal In a liquid crystal display device, liquid crystal is a substance that does not itself illuminate light. Instead, the liquid crystal relies on light received from a light source in order for the liquid crystal to display data images. In the case of a typical liquid crystal display device, a backlight module powered by electricity supplies the needed light.
  • FIG. 11 represents a typical direct type backlight module 100 .
  • the backlight module 100 includes a housing 101 , a light reflective plate 102 , a light diffusion plate 103 , a prism sheet 104 , and a plurality of light emitting diode 105 (hereinafter called LED).
  • the housing 101 includes a rectangular base 1011 and four sidewalls 1013 extending from a periphery of the base 1011 .
  • the base 1011 and the four sidewalls 1013 cooperatively define a chamber 107 .
  • Each LED 105 includes a base portion 1053 and a light-emitting portion 1051 disposed on the base portion 1053 .
  • the LEDs 105 are electrically connected to a printed circuit board 107 , and the printed circuit board 107 is fixed to the base 1011 of the housing 101 .
  • the light reflective plate 102 is disposed on the LEDs 105 in the chamber 1017 .
  • the light reflective plate 102 defines a plurality of through holes (not labeled) that allows the light-emitting portions 1051 of the LED 105 to pass through and to emit light to be transmitted to the light diffusion plate 103 .
  • the light diffusion plate 103 and the prism sheet 104 are stacked in that order on the chamber 1017 . Light emitted from the LEDs 105 is substantially reflected by the light reflective sheet 102 to enter the light diffusion plate 103 , and diffused uniformly in the light diffusion plate 103 , and finally surface light is output from the prism sheet 104 .
  • each LED 105 further includes a reflective sheet 106 disposed on the top of the light-emitting portion 1051 , configured for decreasing the brightness of a portion of the backlight module 100 above the LED 105 .
  • the brightness of the backlight module 100 is still not uniform.
  • One method of enhancing the uniformity of brightness of the backlight module 100 is to increase the space between the light diffusion plate 103 and the LEDs 105 . This increase in space tends to eliminate potential dark areas.
  • increasing the space between the diffusion plate 103 and the LEDs 105 will also increase the thickness of the backlight module and further the overall intensity of the output light rays is reduced.
  • An optical plate includes at least one transparent plate unit.
  • the transparent plate unit includes a first surface, a second surface, a plurality of conical frustum protrusions, a plurality of spherical protrusions and a lamp-receiving portion.
  • the second surface is opposite to the first surface.
  • the conical frustum protrusions are formed at the first surface.
  • the spherical protrusions are formed at the second surface.
  • the lamp-receiving portion is defined in at least one of the first surface and the second surface.
  • a backlight module includes a housing, a side-lighting type point light source, an optical plate, and a light diffusion plate.
  • the housing includes a base and a plurality of sidewalls extending around a periphery of the base, the base and the sidewalls cooperatively forming an opening.
  • the point light source is disposed on the base, each point light source having a light-emitting portion.
  • the same optical plate as described in the previous paragraph is employed in this embodiment.
  • the light-emitting portion of the point light source is inserted in the lamp-receiving portion of the optical plate correspondingly.
  • the light diffusion plate is disposed on the housing over the opening.
  • FIG. 1 is a side cross-sectional view of a backlight module using an optical plate according to a first preferred embodiment of the present invention.
  • FIG. 2 is an isometric view of the optical plate of FIG. 1 .
  • FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2 .
  • FIG. 4 is an isometric, inverted view of the optical plate of FIG. 2 .
  • FIG. 5 is a side cross-sectional view of an optical plate according to a second preferred embodiment of the present invention.
  • FIG. 6 is a an isometric view of an optical plate according to a third preferred embodiment of the present invention.
  • FIG. 7 is a top plan view of an optical plate according to a fourth preferred embodiment of the present invention.
  • FIG. 8 is similar to FIG. 7 , except that showing a bottom plan view of the optical plate.
  • FIG. 9 is an exploded, isometric view of an optical plate according to a fifth preferred embodiment of the present invention.
  • FIG. 10 is a top plan view of an optical plate according to a sixth preferred embodiment of the present invention.
  • FIG. 11 is a side cross-sectional view of a conventional backlight module.
  • the backlight module 200 includes an optical plate 20 , a housing 21 , a light reflective plate 22 , a light diffusion plate 23 , a LED 25 and a reflective member 27 .
  • the housing 21 includes a rectangular base 211 and four sidewalls 213 extending around a periphery of the base 211 .
  • the base 211 and the sidewalls 213 cooperatively define an opening 217 .
  • the optical plate 20 , the light reflective plate 22 , the LED 25 and the reflective member 27 are received in the housing 21 .
  • the light diffusion plate 23 is disposed on the housing 21 over the opening 217 .
  • the optical plate 20 is a transparent square plate, which can be mounted into the housing 21 .
  • the optical plate 20 includes a light output surface 202 , a bottom surface 203 opposite to the light output surface 202 .
  • a plurality of conical frustum protrusions 205 are formed on the light output surface 202 .
  • a plurality of spherical protrusions 206 are formed at the bottom surface 203 .
  • the optical plate 20 further includes a lamp-receiving portion 204 defined in a center of the bottom surface 203 .
  • the lamp-receiving portion 204 is a through hole communicating between the light output surface 202 and the bottom surface 203 .
  • the optical plate 20 can be made of material selected from the group consisting of polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), copolymer of methylmethacrylate and styrene (MS), and any suitable combination thereof.
  • PC polycarbonate
  • PMMA polymethyl methacrylate
  • PS polystyrene
  • MS copolymer of methylmethacrylate and styrene
  • the conical frustum protrusions 205 are distributed on the light output surface 202 in a matrix manner except a part of the lamp-receiving portion 204 .
  • a maximum radius R 1 of each conical frustum protrusion 205 is configured to be larger than 0.01 millimeters, and less than about 2 millimeters.
  • a height of each conical frustum protrusion is configured to be in a range from about 0.01 millimeters to about 3 millimeters.
  • an inclined angle ⁇ 1 of a conical surface of each conical frustum protrusion 205 with respect to an axis perpendicular to its base surface is larger than zero and equal to or smaller than 60 degrees.
  • a pitch of adjacent conical frustum protrusions 205 is preferably in a range from about 0.025 millimeters to about 2 millimeters.
  • the spherical protrusions 206 are distributed on the bottom surface 203 in a matrix manner except for a substantially square area surrounding the lamp-receiving portion 204 .
  • the spherical protrusion 206 is hemispherical protrusion.
  • a height of the spherical protrusion 206 is equal to the radius of the spherical protrusion 206 that is in a range from about 0.01 millimeters to about 2 millimeters.
  • a pitch of adjacent spherical protrusions 206 is preferably in a range from about 0.025 millimeters to about 2 millimeters.
  • the LED 25 includes a base portion 253 , a light-emitting portion 251 disposed on the base portion 253 .
  • the LED 25 is electrically connected to a printed circuit board 26 that is fixed to the base 211 of the housing 21 .
  • the light-emitting portion 251 of the LED 25 is inserted into the lamp-receiving portion 204 of the optical plate 20 , and the light output surface 202 of the optical plate 20 faces the light diffusion plate 23 .
  • the light reflective plate 22 defines a through hole (not labeled).
  • the light reflective plate 22 is disposed under the bottom surface 203 of the optical plate 20 , the LED 25 and passes through the light reflective plate 22 via the through hole.
  • the reflective member 27 is a reflective sheet disposed on the top of the light-emitting portion 251 and the reflective member 27 covers the top of the light-emitting portion 251 for decreasing the brightness of a portion of the backlight module 200 above the LED 25 .
  • the reflective member 27 can be a light reflective film formed on the top of the light-emitting portion 251 .
  • light emitted from the light-emitting portion 251 of the LED 25 enter the optical plate 20 via an inner surface of the lamp-receiving portion 204 .
  • a significant amount of light travels through the optical plate 20 . Due to the inclination of the conical surfaces of the conical frustum protrusions 205 , incident light that may have been internally reflected on a flat surface, is reflected by the conical surfaces of the conical frustum protrusions 205 . As a result, a great amount of light is able to be outputted, from the light output surface 212 , faster.
  • the conical frustum protrusions 205 can condense and collimate emitted light, thereby improving a light illumination brightness. Furthermore, because the LED 25 is positioned in the lamp-receiving portion 204 , light is uniformly outputted from the light output surface 202 of the optical plate 20 , except that the portion above the LED 25 has a relatively low illumination. Light from the optical plate 20 can be further substantially mixed in a chamber between the optical plate 20 and the light diffusion plate 23 , and finally uniform surface light is outputted from the light diffusion plate 23 . A distance from the LED 25 to the light diffusion plate 23 may be configured to be very short, with little or no potential risk of having dark areas on the portion of the backlight module 200 directly above the LED 25 . Accordingly, the backlight module 200 can have a thin configuration while still providing good, uniform optical performance.
  • the light reflective plate 22 can be omitted.
  • a high reflectivity film can be deposited on inner surfaces of the base 211 and the sidewalls 213 of the housing 21 .
  • the housing 21 is made of metal materials, and has high reflectivity inner surfaces.
  • the backlight module 200 can further include a prism sheet 24 disposed on the light diffusion plate 23 .
  • the light reflective plate 22 can further include four reflective sidewalls 223 extending from a periphery thereof and contact with the sidewalls 213 of the housing 21 respectively.
  • an optical plate 30 in accordance with a second preferred embodiment of the present invention is shown.
  • the optical plate 30 is similar in principle to the optical plate 20 of the first embodiment, however the lamp-receiving portion 304 of the optical plate 30 is a blind hole.
  • a LED (not shown) can be mounted into the lamp-receiving portion 304 of the optical plate 30 to form a backlight module.
  • a reflective member (not shown) can be also positioned on a part of the light output surface 302 above the lamp-receiving portion 304 .
  • an optical plate 40 in accordance with a third preferred embodiment is shown.
  • the optical plate 40 is similar in principle to the optical plate 20 of the first embodiment ( FIG. 2 ), however stacked conical frustum protrusions 405 are different from the conical frustum protrusions 205 of the optical plate 20 .
  • Each stacked conical frustum protrusion 405 is comprised of at least two conical frustum protrusions stacked together.
  • the stacked conical frustum protrusion 405 includes a first conical frustum protrusion and a second conical frustum protrusion, the second conical frustum protrusion disposed on top of the first conical frustum protrusion.
  • inclined angles of the conical frustums of the conical frustum protrusions 405 increases along a direction away from its base surface.
  • Each of the inclined angles of the conical frustum protrusions 405 is larger than zero, and equal to or smaller than 60 degrees.
  • an optical plate 50 in accordance with a fourth preferred embodiment is shown.
  • the optical plate 50 is similar in principle to the optical plate 20 of the first embodiment ( FIG. 2 ), however, conical frustum protrusions 505 and spherical protrusions 506 are both arranged separately along a plurality of imaginary circles that have a same center. The center of the imaginary circles is also the center of a lamp-receiving portion 504 of the optical plate 50 .
  • the optical plate 60 includes four transparent plate units 62 .
  • Each transparent plate unit 62 is the same as the optical plate 20 of the first embodiment.
  • the four transparent plate units 62 are tightly arranged side by side to form the assembled optical plate 60 . It is to be understood that four side-lighting type LEDs and the combined optical plate 60 can be mounted into a housing to form a larger size backlight module.
  • a plurality of red, green, and blue colored LEDs can be inserted into the lamp-receiving portions of the combined optical plates, such that a mixed white surface light can be obtained.
  • other kinds of point light source such as field emission lamps and so on, can replace the LEDs 25 in above embodiments.
  • an optical plate 70 in accordance with a sixth preferred embodiment is shown.
  • the optical plate 70 is similar in principle to the optical plate 50 of the fourth embodiment.
  • the optical plate 70 is a rectangular, and the conical frustum protrusions 702 are arranged radially from a lamp-receiving portion 704 .
  • the sizes of the conical frustum protrusions 702 increase as a distance of the conical frustum protrusions 702 from the lamp-receiving portion 605 .
  • This configuration of the optical plate 70 may have a relatively good uniformity of light output.
  • the optical plate 20 can be positioned in the housing 21 and the light output surface 202 faces the light diffusion plate 23 , but also the optical plate 20 can be positioned in the housing 21 and the bottom surface 203 faces the light diffusion plate 23 . That is, the conical frustum protrusions 205 are formed at a first surface of the optical plate 20 , and the spherical protrusions 206 are formed at a second surface of the optical plate 20 . The first surface is selected from one of the light output surface 202 and the bottom surface 203 , and the second surface is selected from the other one of the light output surface 202 and the bottom surface 203 .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
US11/845,100 2007-04-27 2007-08-27 Optical plate and backlight module using the same Expired - Fee Related US7654723B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN200710200535.3 2007-04-27
CN200710200535 2007-04-27
CN2007102005353A CN101295041B (zh) 2007-04-27 2007-04-27 背光模组及其光学板

Publications (2)

Publication Number Publication Date
US20080266874A1 US20080266874A1 (en) 2008-10-30
US7654723B2 true US7654723B2 (en) 2010-02-02

Family

ID=39886736

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/845,100 Expired - Fee Related US7654723B2 (en) 2007-04-27 2007-08-27 Optical plate and backlight module using the same

Country Status (2)

Country Link
US (1) US7654723B2 (zh)
CN (1) CN101295041B (zh)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070030415A1 (en) * 2005-05-16 2007-02-08 Epstein Kenneth A Back-lit displays with high illumination uniformity
US20080111947A1 (en) * 2006-11-15 2008-05-15 3M Innovative Properties Company Back-lit displays with high illumination uniformity
US20080111948A1 (en) * 2006-11-15 2008-05-15 3M Innovative Properties Company Back-lit displays with high illumination uniformity
US20090168420A1 (en) * 2007-12-26 2009-07-02 National Chiao Tung University Optical element apparatus for two-dimensional controllable localized partition backlight module
US20090323329A1 (en) * 2008-06-27 2009-12-31 Hon Hai Precision Industry Co., Ltd. Light source device
US20100046219A1 (en) * 2007-04-12 2010-02-25 Koninklijke Philips Electronics N.V. Light guide and light-output device
US20100135004A1 (en) * 2006-11-15 2010-06-03 Epstein Kenneth A Back-lit displays with high illumination uniformity
US9512350B2 (en) 2013-11-07 2016-12-06 Halliburton Energy Services, Inc. In-situ generation of acid for use in subterranean formation operations
US9734365B2 (en) 2012-09-10 2017-08-15 Avery Dennison Retail Information Services, Llc Method for preventing unauthorized diversion of NFC tags
US9767329B2 (en) 2012-11-19 2017-09-19 Avery Dennison Retail Information Services, Llc NFC tags with proximity detection
US9858583B2 (en) 2011-09-01 2018-01-02 Avery Dennison Retail Information Services, Llc Apparatus, system and method for tracking consumer product interest using mobile devices
US9892398B2 (en) 2011-11-02 2018-02-13 Avery Dennison Retail Information Services, Llc Distributed point of sale, electronic article surveillance, and product information system, apparatus and method
US10540527B2 (en) 2012-10-18 2020-01-21 Avery Dennison Retail Information Services Llc Method, system and apparatus for NFC security
US10977969B2 (en) 2010-01-29 2021-04-13 Avery Dennison Retail Information Services, Llc RFID/NFC panel and/or array used in smart signage applications and method of using
US10977965B2 (en) 2010-01-29 2021-04-13 Avery Dennison Retail Information Services, Llc Smart sign box using electronic interactions

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL215189B1 (pl) * 2008-12-11 2013-11-29 Inst Badawczy Drog I Mostow Modulowy uklad optyczny tablicy swietlnej
US10001592B2 (en) * 2013-11-22 2018-06-19 Lumens Co., Ltd. Backlight unit, double cone-shaped reflector, double cone-shaped reflector strip, illumination apparatus, and method of manufacturing double cone-shaped reflector
JP7088650B2 (ja) * 2017-09-29 2022-06-21 デクセリアルズ株式会社 光学体及び発光装置
US11287693B2 (en) * 2017-10-06 2022-03-29 Dexerials Corporation Optical body, method for manufacturing optical body, light-emitting apparatus, and display apparatus for amusement equipment
WO2020099181A1 (en) * 2018-11-12 2020-05-22 Signify Holding B.V. Optical structure for edge-lit luminaire

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053208A (en) * 1975-02-03 1977-10-11 Fuji Photo Film Co., Ltd. Rear projection screens
US5839823A (en) * 1996-03-26 1998-11-24 Alliedsignal Inc. Back-coupled illumination system with light recycling
US6709143B2 (en) * 2001-02-22 2004-03-23 Keiwa Kabushiki Kaisha Light diffusion sheet and backlight unit using the same
US6752505B2 (en) * 1999-02-23 2004-06-22 Solid State Opto Limited Light redirecting films and film systems
US6925243B2 (en) * 2003-07-11 2005-08-02 Hon Hai Precision Ind. Co., Ltd. Light guide plate with parallel protrusions and surface light source unit incorporating the same
US7160016B2 (en) * 2002-12-20 2007-01-09 Hon Hai Precision Ind. Co., Ltd. Light guide plate with convergence concavities and method for manufacturing the light guide plate
US20070147089A1 (en) * 2005-12-23 2007-06-28 Innolux Display Corp. Backlight module and lcd having same
US20070165394A1 (en) * 2006-01-14 2007-07-19 Hon Hai Precision Industry Co., Ltd. Optical sheet and backlight module using the same
US7422357B1 (en) * 2007-05-18 2008-09-09 Hon Hai Precision Industry Co., Ltd. Optical plate and backlight module using the same
US7458714B2 (en) * 2007-04-30 2008-12-02 Hon Hai Precision Industry Co., Ltd. Optical plate and backlight module using the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6827456B2 (en) * 1999-02-23 2004-12-07 Solid State Opto Limited Transreflectors, transreflector systems and displays and methods of making transreflectors
JP4822486B2 (ja) * 2001-09-26 2011-11-24 Ｎｌｔテクノロジー株式会社 半透過反射板及び半透過型液晶表示装置

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4053208A (en) * 1975-02-03 1977-10-11 Fuji Photo Film Co., Ltd. Rear projection screens
US5839823A (en) * 1996-03-26 1998-11-24 Alliedsignal Inc. Back-coupled illumination system with light recycling
US6752505B2 (en) * 1999-02-23 2004-06-22 Solid State Opto Limited Light redirecting films and film systems
US6709143B2 (en) * 2001-02-22 2004-03-23 Keiwa Kabushiki Kaisha Light diffusion sheet and backlight unit using the same
US7160016B2 (en) * 2002-12-20 2007-01-09 Hon Hai Precision Ind. Co., Ltd. Light guide plate with convergence concavities and method for manufacturing the light guide plate
US6925243B2 (en) * 2003-07-11 2005-08-02 Hon Hai Precision Ind. Co., Ltd. Light guide plate with parallel protrusions and surface light source unit incorporating the same
US20070147089A1 (en) * 2005-12-23 2007-06-28 Innolux Display Corp. Backlight module and lcd having same
US20070165394A1 (en) * 2006-01-14 2007-07-19 Hon Hai Precision Industry Co., Ltd. Optical sheet and backlight module using the same
US7458714B2 (en) * 2007-04-30 2008-12-02 Hon Hai Precision Industry Co., Ltd. Optical plate and backlight module using the same
US7422357B1 (en) * 2007-05-18 2008-09-09 Hon Hai Precision Industry Co., Ltd. Optical plate and backlight module using the same

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070030415A1 (en) * 2005-05-16 2007-02-08 Epstein Kenneth A Back-lit displays with high illumination uniformity
US20100135004A1 (en) * 2006-11-15 2010-06-03 Epstein Kenneth A Back-lit displays with high illumination uniformity
US20080111947A1 (en) * 2006-11-15 2008-05-15 3M Innovative Properties Company Back-lit displays with high illumination uniformity
US20080111948A1 (en) * 2006-11-15 2008-05-15 3M Innovative Properties Company Back-lit displays with high illumination uniformity
US8690373B2 (en) 2006-11-15 2014-04-08 3M Innovative Properties Company Back-lit displays with high illumination uniformity
US7766528B2 (en) * 2006-11-15 2010-08-03 3M Innovative Properties Company Back-lit displays with high illumination uniformity
US8414162B2 (en) * 2007-04-12 2013-04-09 Koninklijke Philips Electronics N.V. Light guide and light-output device
US20100046219A1 (en) * 2007-04-12 2010-02-25 Koninklijke Philips Electronics N.V. Light guide and light-output device
US7794129B2 (en) * 2007-12-26 2010-09-14 National Chiao Tung University Optical element apparatus for two-dimensional controllable localized partition backlight module
US20090168420A1 (en) * 2007-12-26 2009-07-02 National Chiao Tung University Optical element apparatus for two-dimensional controllable localized partition backlight module
US7806580B2 (en) * 2008-06-27 2010-10-05 Hon Hai Precision Industry Co., Ltd. Light source device
US20090323329A1 (en) * 2008-06-27 2009-12-31 Hon Hai Precision Industry Co., Ltd. Light source device
US10977969B2 (en) 2010-01-29 2021-04-13 Avery Dennison Retail Information Services, Llc RFID/NFC panel and/or array used in smart signage applications and method of using
US10977965B2 (en) 2010-01-29 2021-04-13 Avery Dennison Retail Information Services, Llc Smart sign box using electronic interactions
US10607238B2 (en) 2011-09-01 2020-03-31 Avery Dennison Corporation Apparatus, system and method for consumer tracking consumer product interest using mobile devices
US9858583B2 (en) 2011-09-01 2018-01-02 Avery Dennison Retail Information Services, Llc Apparatus, system and method for tracking consumer product interest using mobile devices
US9892398B2 (en) 2011-11-02 2018-02-13 Avery Dennison Retail Information Services, Llc Distributed point of sale, electronic article surveillance, and product information system, apparatus and method
US10282572B2 (en) 2012-09-10 2019-05-07 Avery Dennison Retail Information Services, Llc Method for preventing unauthorized diversion of NFC tags
US9734365B2 (en) 2012-09-10 2017-08-15 Avery Dennison Retail Information Services, Llc Method for preventing unauthorized diversion of NFC tags
US10540527B2 (en) 2012-10-18 2020-01-21 Avery Dennison Retail Information Services Llc Method, system and apparatus for NFC security
US11126803B2 (en) 2012-10-18 2021-09-21 Avery Dennison Corporation Method, system and apparatus for NFC security
US10402598B2 (en) 2012-11-19 2019-09-03 Avery Dennison Retail Information Services, Llc NFC tags with proximity detection
US10970496B2 (en) 2012-11-19 2021-04-06 Avery Dennison Retail Information Services, Llc NFC tags with proximity detection
US9767329B2 (en) 2012-11-19 2017-09-19 Avery Dennison Retail Information Services, Llc NFC tags with proximity detection
US9512350B2 (en) 2013-11-07 2016-12-06 Halliburton Energy Services, Inc. In-situ generation of acid for use in subterranean formation operations

Also Published As

Publication number Publication date
CN101295041A (zh) 2008-10-29
US20080266874A1 (en) 2008-10-30
CN101295041B (zh) 2011-12-21

Similar Documents

Publication Publication Date Title
US7654723B2 (en) Optical plate and backlight module using the same
US7695165B2 (en) Optical plate and backlight module using the same
US7722241B2 (en) Optical plate and backlight module using the same
US7422357B1 (en) Optical plate and backlight module using the same
US7810983B2 (en) Optical plate and backlight module using the same
US7819570B2 (en) Optical plate and backlight module using the same
US7458714B2 (en) Optical plate and backlight module using the same
US7635193B2 (en) Optical plate and backlight module using the same
US7810949B2 (en) Optical plate and backlight module using the same
US7798693B2 (en) Optical plate and backlight module using the same
US7677749B2 (en) Optical plate and backlight module using the same
US20080266879A1 (en) Optical plate and backlight module using the same
US7663804B2 (en) Optical plate and backlight module using the same
US7654719B2 (en) Optical plate and backlight module using the same
US7670020B2 (en) Optical plate and backlight module using the same
US7740374B2 (en) Optical plate and backlight module using the same
US7556417B2 (en) Optical plate and backlight module using the same
US7740388B2 (en) Optical plate and backlight module using the same
US7413318B2 (en) Direct type backlight module
US20090016067A1 (en) Optical plate and backlight module using the same
US20060012993A1 (en) Surface light source device, illumination unit and light flux control member
US20080266872A1 (en) Optical plate and backlight module using the same
US7837373B2 (en) Optical plate having encircling protrusions and elongated V-shaped protrusions and backlight module using the same
US7918599B2 (en) Optical plate and backlight module using the same
US7594745B2 (en) Optical plate and backlight module using the same

Legal Events

Date Code Title Description
AS Assignment

Owner name: HON HAI PRECISION INDUSTRY CO., LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHANG, SHAO-HAN;REEL/FRAME:019746/0100

Effective date: 20070822

Owner name: HON HAI PRECISION INDUSTRY CO., LTD.,TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHANG, SHAO-HAN;REEL/FRAME:019746/0100

Effective date: 20070822

FPAY Fee payment

Year of fee payment: 4

FEPP Fee payment procedure

Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.)

LAPS Lapse for failure to pay maintenance fees

Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.)

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20180202